P2032: Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2)

P2032 means the signal of exhaust gas temperature sensor 2 on bank 1 is below its valid range. What that means electrically depends on the sensor type. On the Opel/GM 2.0 CDTi in the Saab 9-5 (2010) sensor 2 sits in the particulate filter and its voltage falls as it gets hotter, so a reading below 0.4 V for more than 1 s points to a short to ground; the code is Type A there. GM's 2009 Duramax uses the opposite characteristic and fails below 0.307 V, equivalent to -40 °C, for 300 s, which is typical of an open or grounded signal. GM's 2018 diesels compare against a resistance-equivalent limit below 142 Ω as a Type B code, Ford's 2023 diesels against 0.10 V within 2 s. So check the wiring diagram before deciding whether low means a short or an open. Without the sensor the ECM cannot control filter temperature and usually blocks regeneration.

Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.

Symptoms

• Malfunction indicator lamp on
• DPF regeneration inhibited, soot load rises

Most likely causes

• Signal wire chafed to ground on the exhaust
• Internal sensor failure
• Damaged or corroded connector

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the soot load and differential pressure with a scanner
2. With the connector unplugged, check whether the signal wire is making contact with ground.
3. Check the differential pressure sensor's hoses
4. Check the temperatures before and after the filter
5. Fix any fuel injection or EGR codes before regenerating
6. Perform a regeneration while driving or at a repair shop when the diagnosis allows it

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P2032 means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 0: Subsystem depends on the code range
• 32: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2032?

If the light is on steadily, take a highway drive or go to a repair shop soon. If the car is in limp mode or the light is flashing, do not push the engine.

What causes code P2032?

The most common causes are: signal wire chafed to ground on the exhaust; internal sensor failure; damaged or corroded connector.

Related codes

• P2031Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2)
• P2033Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)
• P2035Exhaust Gas Temperature Sensor Circuit Low (Bank 2 Sensor 2)
• P0545Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 1

Sources

• saabwisonline.com: dtc p2032 or p2033 lby
• gsi.ext.gm.com: 09OBDG01 DURAMAX Engine Diagnostics
• gsi.ext.gm.com: 18OBDG04 Engine Diagnostics
• fordservicecontent.com: obd summary diesel 2023

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.